Carlson benelli m4 magazine extension. Developed to fit many models from the top brands in the industry, these tubes come in a variety of capacities from +2 to +6 rounds making them great for waterfowlers chasing snow geese, 3 gunners and home defense applications. Benelli M4. Additional information. The two shot and three shot Benelli M2 Mag Tube Extensions do not protrude beyond the barrel of a standard 18. Select Options. 00-inch) Add firepower to your favorite shotgun. I would like to know some highly reccomended American -made extensions and some links to purchase them. Carlson's presents their solution to upgrading the capacity to you favorite shotgun. Especially since Benelli is no longer offering them to civillians. 490. Jul 9, 2020 · Carlson's Choke Tubes Benelli Shotgun Magazine Extension Assembly 04518 Color: Black, Finish: Black, Magazine Capacity: 10 Round, 15% Off w/ Free Shipping 1. These magazine extensions are constructed of blued solid steel and come with spring, base clamp with swivel stud (included) to work with quick detachable swivel (not included), and a high visibility follower (some extensions require factory follower Carlson's 04510 Ten Shot Magazine Extension. Price: $225. Overall Length of Extensions: 04500 (8. 99. UPC. Quantity: 40+ Years in Business. 25") Magazine round count is for total capacity using 2 3/ Bud's Item #. WARNING This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. $89. No new spring is needed as factory spring works perfect. by Stephendh2000 , Verified Owner from TX, United States Written on February 24, 2022. Details. Browning A5 (vintage and new) Magazine Price. 3 posts · Joined 2021. Premium 1. Share your email and get 10% off! Feb 19, 2022 · Carlson 7-Shot Magazine Extension. Use factory spring machined from solid 4140 steel. Brownells Magazine Tube Extensions products have an average rating of 4. P65Warnings. Chris's Review of Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension. Let's go over my Benelli M4 upgrades and install the Benelli 7 round magazine tube!Benelli Magazine Tube Install Video Here - https://goo. I think you have a lot better options available than going with the steel FFT tube with the NP3 finish. Mike T. Buy product. SKU: BEN-81043//OUT OF STOCK. Buy It Now. View cart for details. Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension (15) $85. 95 Select Options. Toll-Free: +1-800-504-5897 Help Center Check Order Status Feb 3, 2024 · Carlson's Shotgun Magaazine Extension 04508. Shipping calculated at checkout. Breathe easy. Worth the wait - Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension. See details. Depending on what company makes/sells it, the full length extension tube for my 18. This tube is about 3/4” too long, which will not allow you to tighten up the barrel enough to seat it. 99 (Save 14%) $213. Factoy Original, Factory New Benelli full length 7-round magazine tube, for full capacity and ultimate reliability from your M4 shotgun. Frank Fernandez. The nut will extend past the barrel in this current Benelli M4 Magazine Extension Tubes. Extension kit includes the extended magazine tube, extended spring, bright plastic follower Beretta-Benelli Mobil 28ga; Benelli Crio-Crio Plus 28ga; Beretta Optima HP 28ga; Browning Invector Plus 28ga; Huglu 28GA. One shot extension for the Benelli M4. (Follower NOT incuded with #04508) The threaded tube replaces your magazine cap and gives you the ability to add extra rounds to your magazine. gov. Design and Construction: The Briley M4 Carbon Fiber Magazine is made from twill weave carbon fiber with 17-4 stainless end caps, which offers a lightweight and durable Shop Carlson's Choke Tubes Magazine Extension Assembly | Up to 15% Off 5 Star Rating on 1 Review for Carlson's Choke Tubes Magazine Extension Assembly Coupon Available + Free Shipping over $49. The Carlson's Magazine Extension Tubes increase the capacity of Remington 870, 1100, and 11-87 shotguns by allowing for 10 extra rounds of 12 gauge ammunition. Constructed of blued solid steel, this magazine extension tube comes with a spring, base clamp, and a high visibility follower. $79. 99 12% Coupon. $105. Carlsons. It fits the factory Benelli M4 perfectly. Tubular Magazine Springs. 25") Magazine round count is for total capacity using 2 3/ Price: $49. Benelli M4/M1014 Magazine Extension & 7rd Spring - 2 Shot Mag Tube In Black. 11 product ratings - Carlson's Benelli M4 Magazine Extension- 7 Shot. 95. The threaded tube of this Price: $245. Black River Manufacturing Benelli M4 Extended Magazine Tube $249. 410 CHOKE Tubes. 81043 FF NP3 - FFT NP3 Coated Steel 2-Round Magazine Extension Tube for Titanium Cerakote H20 M4 Shotguns THE NP3 TUBES ARE THE BEST CHOICES FOR MATCHING A TUBE TO YOUR "TITANIUM CERAKOTE H20 BENELLI M4 SHOTGUN" - IT IS A SO FOR A $100 CANCEL, $5. The FFT full length steel magazine tube is manufactured with one-piece construction for strength and durability. Get your questions about Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension answered by Expert staff and verified buyers including aesthetics, compatibility, durability & more! OpticsPlanet Toll-Free: +1-800-504-5897 Help Center Check Order Status Dec 12, 2023 · This magazine tube has been modified to meet Canadian capacity requirements. Announcements. 5" M2 Tactical was called an 8-shot, a 4-shot, or a 7-shot. Get your questions about Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension answered by Expert staff and verified buyers including aesthetics, compatibility, durability & more! OpticsPlanet Brand: Benelli. 95 15% Coupon Full Length Benelli M4 Carbon Fiber Magazine. 88"). Buyer pays for return shipping. Oct 4, 2006 · Everybody and their mother seems to be offering a magazine extension for the M4/M1014 now. Good upgrade to the Benelli M4 with the faux 2 round extension. Overall Length of Extension: 04510 (13. Made with 2x2 twill weave carbon fiber tube this full-length magazine replacement for the M4 extends the capacity of the Benelli M4 to 7+1. 99 Free shipping SO FOR A $100 CANCEL, $5. However, the follower I ordered does not fit my Mac-1014. 25"), and 04506 (6. Sold out. Gunsmithing will be required for proper Show. In stock in approximately 36 weeks. Jan 8, 2016 · Posted March 1, 2021. 00 WOULD BE DEDUCTED FROM YOUR REFUND TO COVER THE UNRECOVERABLE CREDIT CARD FEES. This will allow +1 round of 3 inch magnum shot shell in a limited cap factory mag tube. If I float or as some call it ghost one on the lifter, I can get 10 00buck shells in mine. Both tubes function flawlessly I have yet to have a malfunction with hundreds of rounds Carlsons 04508: Carlson's Shotgun Magazine Extensions for Home Defense, Tactical and Law Enforcement Use Add firepower to your favorite shotgun. No tools needs. Carlson's Benelli M4 Magazine Extension- 7 Shot. Full Length Benelli M4 Carbon Fiber Magazine. 52 – $ 137. Also, it is not overpriced like most of the accessories for the Benelli M4. The magazine extension tube is great for home protection, competition shooting, and law enforcement. Save up to 15% when you buy more. $119. Mar 13, 2022 · Welcome to my channel Arsenal Co. 00. M4 2 Shot Magazine Extension Kit Easy-to-install magazine extension increases your 12 gauge shotgun’s capacity to two additional 2¾” shells. Carlson's Magazine Extensions extend the capacity of the 12 gauge Benelli M1, M2 or Super Black Eagle I, II with no permanent modification. Controlled gas nitride finish. SPECS: All extensions are 12 gauge only. Benelli M4 One Shot Extension. $ 97. Add To Cart. The threaded tube replaces you magazine cap and gives you the ability to add extra rounds to you magazine. This magazine tube replaces the existing magazine tube on your Benelli M4 shotgun. Trending at $74. It replaces the black fake extension that comes on the shotgun and fits the threading perfectly. Carlson's Shotgun Magazine 20ga Extension Assembly. Includes tube and extended spring. 5"), 04502 (6. These magazine extensions are constructed of blued solid steel and come with spring, base clamp with swivel stud to work with quick detachable swivel (not included), and a high visibility follower (some extensions require factory follower Sep 7, 2006 · These extensions get confusing. Choate Fabarm FP6, Benelli NOVA, Franchi 912 and 612 Franchi, H&R Excell Auto 1871, Tri Star Cobra, Raptor Night Manager 7 shot 12ga 7 Shot Extension w/Accessory Rail- Matt. It is designed to replace your shotgun’s magazine cap Hello! In this video, I go through the simple installation of a Carlson's tactical choke tube on my Benelli M4 shotgun. Community. 81043 Benelli OEM 2 Round Magazine Extension Tube for Black Shotguns LE This is an OEM (original) Benelli part - part 81043. The M4 with a 7-round magazine will accept our BR extension tube nut (NUT-BR-12-00); this will allow any MXT extension kit to be used to add to the 7-round capacity. Brand new in original packaging. Installs in minutes (instructions included). This will allow one extra round of 2. Made in USA by Carlson, this high-quality magazine extension adds 3 shots to your existing magazine. Answered by Carlsons Choke Tubes , Manufacturer from KS, United States, on November 17, 2021. The magazine tube is the original black/grey cerakote color. Mag extension is working great. Made from blued solid steel, Carlson's Shotgun Magazine Extensions include everything you need to install. Review for Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension. The match will be in the ballpark if you have a Cerakote model. 9 rds of 3 inch shells, making it Canadian legal. Thanks for any input. Bismuth Bone Buster Choke Tubes; Black Cloud Choke Tubes These magazine extensions are constructed of blued solid steel and come with spring, base clamp, and a high visibility follower. OUR TOP PICK: Scattergun Technology - Remington 870/1100/11-87. Carlson's Shotgun Magazine Extension. $80. Price: $14. A Benelli M4 magazine extension tube is the perfect way to increase the capacity of your Benelli M4 from the standard four rounds to seven rounds. The Carlson 7-Shot Magazine Extension does this and does it well. LSX Shotgun Extension Tubes. 00 USD. **Remington extensions require removal of tabs / detent in magazine tube on newer model shotguns** 04505 - (8. garyjohn_58 (2) 100%. Satisfaction Guaranteed. SJ Hardware Benelli M4 +1 Canadian Legal MAG Extension. Includes tube, spring, and high-visibility follower. $ 57. If you use the GG&G three shot magazine tube extension you will now have a 7 round capacity in the magazine. Made in Canada. Add to cart. 00 35% Bonus Bucks. Dec 25, 2020 · whiskeyriverrifleman. At a Glance: Our Top Picks for Remington 870 Mag Extensions. Very difficult to source. carlson's magazine extension assembly- 12ga - benelli nova / super nova, cz 912, and beretta extrema - 7-shot Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Mar 3, 2021 · The Benelli M4 is a fine shotgun, but it comes from the factory with a faux extended magazine tube that only carries 5 rounds of 2 3/4. The magazine is supplied with an extended magazine spring and is Carlson's Fits Benelli M-4 M4 Shotgun 12ga 7 Shot Magazine Tube Extension #04508 Extended Magazine Tube. Feb 9, 2024 · Carlson's Benelli M4 12ga Magazine Extension- 7 Shot 04508. 0 of 0 found the following answer helpful. Choose Options. Briley MFG Full Length Benelli M4 Carbon Fiber Magazine Benelli M1 and M2 Magazine Extension |Two And Three Shot Benelli Mag Tubes GG&G Tactical Accessories Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension 15% Off Highly Rated w/ Free Shipping and Handling The addition of the GG&G two shot magazine tube extension will allow you to keep a total of 6 rounds in the magazine. Adding this magazine tube changes the magazine capacity on your Benelli This Carlsons Benelli M4 Magazine Extension adss 2 rounds to the standard 5 round magazine tube found on the Benelli M4 shotgun. $85. A. These magazine extensions are constructed of blued solid steel and come with spring and a high visibility follower. Check out all of our Shotgun Magazine Tubes & Parts products at Brownells today. The stainless steel construction of The Benelli m4 seven round magazine tube will replace the five round magazine and dummy extension and extend your magazine to hold seven 2-3/4" or 6 - 3" magnum shells. Carlsons Choke Tube 12 GA Beretta Benelli Mobil Tactical Door Breecher #85006. $59. $49. Finished product will be Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension (15) $85. Nova/Supernova FACTORY CAPACITY: 4 rounds Sure Cycle extended magazine tubes are unlike any standard extension on the market. These Magazine Extensions by Carlson's Choke Tubes are constructed blued solid steel and come with spring base clamp and a high visibility follower. This one's trending. 40. SBE Magazine Extension adds extra firepower to your firearm for little to no cost. Free shipping. Product Overview. This tube will fit flush with an 18. Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension. Description. Manufacturer. 25"), 04504 (14. 15 watchers. The Carlson's Extension expands the capacity of the shotgun to 7 shells of 2-3/4" length. 5” model. For more information go to www. The threaded tube replaces your magazine cap and gives you the ability to add Oct 22, 2020 · In this video I show you how to install a magazine extension tube on Benelli M4 shotgun. freedomfightert Mar 15, 2021 · sonyman74. The full length steel magazine tube is designed to replace the original magazine tube and "limiter" that Benelli installs on every civilian M4 tactical shotgun. 5″ barreled Benelli M4 12 gauge shotgun. 75″ shells for a total of 5. New (Other) $99. #7 · Nov 19, 2021. Model - 04508. FreeStandard Shipping. Sale. Nov 17, 2021 · Get your questions about Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension answered by Expert staff and verified buyers including aesthetics, compatibility, durability & more! OpticsPlanet Toll-Free: +1-800-504-5897 Live Chat Help Center Check Order Status Jun 22, 2023 · Find many great new & used options and get the best deals for Carlson's Magazine Extension Tube 12 GA Benelli M-4 7 Shot 04508 at the best online prices at eBay! Free shipping for many products! 12ga - Benelli M4 - 7-Shot MAGAZINE EXTENSION ASSEMBLY, 12 GAUGE ONLY Carlson's Shotgun Magazine Extensions For Home Defense, Tactical and Law Enforcement Use Add firepower to your favorite shotgun. Yep start at about 16-18 inches, see how the gun functions, how much effort is required to load and that it takes all the shells it's rated for. 70124 FF - M4 - FFT 922 (r) Compliant 5-Round Finished Titanium Magazine Tube for NJ and MA Residents and Short-Barreled Shotguns (SBS) - 1x 922 (r) $ 370. 5″ Flush) Long Invector (1. Gauge: 12 Gauge. Item#04502 is the 7 shot, #04507 is 8 shot, and #04510 is the 10 shot extension. 4 oz and uses 17-4 stainless steel adapters on both the receiver and muzzle end of the magazine. It'll depend on if you have a NP3 or a Cerakote H20. Get the Carlsons Benelli M4 Magazine Extension for sale while supplies last! Midwest Gun Works 04508 - (5. Save up to 5%. I bought a two-shot for hunting and I bought a 10 shot tube for competition. Perfect for competitions, law enforcement, or home defense use. The Briley M4 Carbon Fiber Magazine replaces the factory 5+1 round magazine on Benelli M4 and M1014 Shotguns to 7+1. Browse 17 Magazine Tube Extensions Products. Buy the Carlson's Shotgun Magazine Extension and more quality Fishing, Hunting and Outdoor gear at Bass Pro Shops. As I did on my Smith & Wesson M&P 1 Product Description. $235. 1/5 and 105 reviews from verified buyers and brands like CARLSON'S, CHOATE, NORDIC COMPONENTS, & BENELLI. Free shipping and returns. Price: $49. I own a Citadel Boss Hog it's pretty much the same as the warthog I have 2 Carleson's Benelli mag tube extensions. This M4 of mine has the FFT 7 round tube with the Nordic Components MXT Magazine Extension Kit, +1 and the Nordic Components Shotgun Extension Tube Nut. We do make Extensions to fit the Nova shotguns. 4. Oem Used Benelli M4 M1014 Magazine Tube Extension Plus Two. Security Center. This extension will only work with the Briley full length carbon magazine replacement or any aftermarket full length straight through magazines. With this extension you can bring the total magazine capacity up to 7 rounds. These magazine extensions are constructed of blued solid steel and come with spring, base clamp with swivel stud (included) to work with quick detachable swivel (not included), and a high visibility follower. Available for Benelli, Beretta, Mossberg, Remington, and Stoeger models. Carlsons Benelli M4 Shotgun Magazine Extension Tubes. Buy Benelli LE M4 Full Length 1 Piece Magazine Tube (7 Shot): Benelli LE M4 Full Length 1 Piece Magazine Tube (7 Shot). Members. item 1 Carlson's Benelli M-4 M4 12ga 7 Shot Magazine Tube Extension #04508 Carlson's Benelli M-4 M4 12ga 7 Shot Magazine Tube Extension #04508 $74. Check out the CARLSON'S Magazine Extension 7 Shot Benelli M4 SKU: 155000222 available Online at Brownells Today and many more Shotgun Magazine Tubes & Parts products are available in our Gun Parts Department. **SEE CHART BELOW TO VERIFY SHOTGUN MODEL COMPATIBILITY**. The best Benelli M4 parts on the planet: https://www. SKU:BENM4EXT1. Policies. item 4 Carlson's Magazine Extension Tube 12 GA Benelli M1/M2/SBE1/SBE2, 8 Shot - 04501 Carlson's Magazine Extension Tube 12 GA Benelli M1/M2/SBE1/SBE2, 8 Shot - 04501 $63. 25"), 04501 (10. 30 days returns. Add firepower to your favorite shotgun. Find many great new & used options and get the best deals for Carlson's Shotgun Magazine Extension 04508 at the best online prices at eBay! Free shipping for many products! Nov 24, 2017 · Manufacturer Answer. Finish / Color: Matte Blued. Benelli M4 / M1014 Magazine Extension - 2 Round Mag Extension Tube - Made In USA. Opens in a new window or tab. Beretta-Benelli Mobil 410ga; Short Invector (1. 9″ Flush) 10 GAUGE CHOKE TUBES. 96 Free shipping Carlson's presents their solution to upgrading the capacity to you favorite shotgun. Nov 13, 2012 · It should be between 12" & 16" longer than the tube and extension when not under pressure. No Compliance Regulations Briley Benelli Magazine Extensions and Magazines Benelli M1, M2, Super Black Eagle I II & III, and Super 90 which are manufactured to be the best in market with the highest quality shotgun, firearm, and rifle standards. by Ottos Gramp , Verified Owner from WA, United States Written on March 5, 2021. Mar 1, 2024 · The CARLSON’S MAGAZINE EXTENSION TUBES 12 GAUGE BENELLI NOVA/SUPER NOVA is a high-quality firearm accessory that adds firepower to your favorite shotgun. gl/aJU3WRJoin The Benelli M4/M1014 Magazine Extension - 7 Shot Mag Tube. 151378. Choate Benelli Shotgun Magazine Extension. Seller Center. 723189045081. Lancer’s carbon fiber LSX extended shotgun magazine tubes are the ultimate increased capacity solution for hunting, competition, and home defense. Benelli M4 One Shot Extension. Includes 4 business days handling time after receipt of cleared payment. NOTES: Magazine spring and followers sold separately. Midwest Gun Works Feb 29, 2024 · So keep your eyes focused, and let's get started. 3. This is designed for 12 gauge ammo. Models Fit: Benelli M4. Carlson's Benelli M4 12ga Magazine Extension- 7 Shot 04508. 50 $72. The most difficult part of the install is removal of the spring retainer cap inside the 5 round magazine tube. These magazine extensions are constructed of blued solid steel and come with spring, base clamp with swivel stud (included) to work with quick detachable swivel (not included), and a high visibility follower (some extensions require factory follower and will not come with one). ! In this video I will show you how to install S&J Hardware Canadian compliance mag tube on my brand new Benelli M4. It weighs just 3. This replacement Toll-Free: +1-800-504-5897 Help Center Check Order Status Carlson's Benelli M-4 M4 12ga 7 Shot Magazine Tube Extension #04508 (11) 11 product ratings - Carlson's Benelli M-4 M4 12ga 7 Shot Magazine Tube Extension #04508 $74. 68. The NP3 FFT tube will match pretty damn close to a real deal NP3 M4. This is Benelli M4 Extension Tube. Something went wrong. I'm not looking for the cheapest, just good quality. Add to Cart. No this M4 extension will not fit the Nova shotguns. Corrosion-resistant, stainless steel tube with machined aluminum mounting collar, high strength stainless steel spring, and anodized aluminum follower help ensure reliable feeding . Quantity: E-mail this product to a friend. Browning Invector 10GA; CHOKE TUBE TYPES. 68 Save 15%. Made from blued solid steel, Carlson's Shotgun Magazine Extensions include everything you need to install: spring, base clamp, and a high visibility follower. 96 Example: 8 shot extension= is 7 (2. The extra capacity makes this a perfect addition to your competition or home defense shotgun. $72. 99 12% Coupon 2 models Briley Beretta Auto/Benelli Pump/Franchi 912 Variomax/Stoeger + 8 Rounds Shotgun Magazine Extension w/Swivel As Low As $184. Extension. Mag extension. Some count the total capacity, some count the added capacity, and some count the capacity in the magazine only. 0 rating with 2 reviews review & rate 5 Questions & 5 Answers 12ga - Benelli M4 - 7-Shot MAGAZINE EXTENSION ASSEMBLY, 12 GAUGE ONLY Carlson's Shotgun Magazine Extensions For Home Defense, Tactical and Law Enforcement Use Add firepower to your favorite shotgun. Posted March 16, 2021. Jul 9, 2020 · Made of reliable steel, Carlson's Choke Tubes Magazine Extension 8-Shot Benelli M1,M2. Carlson's Magazine Extensions extend the capacity of the 12 gauge Benelli Nova, Super Nova or Beretta Extrema with no permanent modification. A great improvement to magazine capacity and upgrade to the original design of the Benelli M4. These magazine extensions are constructed of blued solid steel and come with spring, base clamp with swivel stud (included) to work with quick detachable swivel (not included), and a high visi . Easy to follow instructions are included. Benelli M4/M1014 Magazine Extension - 7 Shot Mag Tube In Titanium Cerakote H2O. Largest Manufacturer of Chokes. 75" shells) in the extension and 1 in the chamber, 6 (3" shells) in the extension and 1 in the chamber, or 5 (3 1/2" shells) in the extension and one in the chamber. 50 (Save 15%) $72. Seller pays for return shipping. (49) Write a review. 2 models Briley Full Length Benelli M4 7+1 Rounds Shotgun Magazine (3) As Low As $225. 95 Sale Price: $69. Pictured stabilizer is not included, but available as an option (part XMTSTAB). It is only compatible with the Benelli M4. If it's really stiff to get those last rounds in or doesn't take full capacity, take an inch or two (or Carlson's shotgun magazine extensions for home defense, tactical and law enforcement use add firepower to your favorite shotgun. 60. Brand New. RUNNER-UP: Scattergun Technology - Remington 870/1100/11-87 (2 shot) BEST BUDGET OPTION: Choate - Remington870. Material: Steel. 25-inch) DetailsM4 2 Shot Magazine Extension Kit Easy-to-install magazine extension increases your 12 gauge shotgun’s capacity to two additional 2¾” shells. This tube is compatible with all 12 Gauge Carlson's Shotgun Magazine Extensions For Home Defense, Tactical and Law Enforcement Use, 12ga Only Add firepower to your favorite shotgun. I’m going to try to find a spacer to fill the void until the correct tube becomes available elsewhere. 36 have already sold. ca. Constructed of blued solid steel, the extensions come with a spring, base clamp, and a high visibility follower, along with easy-to-follow instructions for installation. No Compliance Regulations Briley Benelli Magazine Extensions and Magazines Benelli M4 which are manufactured to be the best in market with the highest quality shotgun, firearm, and rifle Feb 24, 2024 · Stephendh2000's Review of Carlson's Choke Tubes Benelli M4 7- Shot Magazine Extension Good upgrade to the Benelli M4 with the faux 2 round extension. Carlson's Benelli M1, M2, Super Black Eagle, Super Black Eagle II, Super Black Eagle III 12ga Magazine Tube Extension- 8 Shot Usually Ships in 24 Hours MSRP: $80. About eBay. xe dk rd qy pd ft xo oz bb zd